Peugeot 107 Rough Running

Rough running and stalling sounds familiar. I had similar issues with my 107. Check your coil pack first, then spark plugs. When was the last time you changed them?

I checked the spark plugs, they seem ok. I suspect the cable or plug connection of the component is defective. What exactly was the issue with yours?

It was the ignition coil itself. I messed with it for a while, checking connections, but eventually just took it to a shop. They confirmed it pretty quick. Best to get it checked professionally.

The workshop confirmed a defective ignition coil, cable or plug connection. Cost 95€. Runs fine now.